Jan I. zwederszoon van MontfoortAge: 27 years1318–1345
- Name
- Jan I. zwederszoon van Montfoort
| Birth | about 1318 48 25 |
| Occupation | burggraaf (count). heer (lord) |
| Death | in battle September 16, 1345 (Age 27 years) |
| Family with parents |
| father |
Zweder hendrikszoon de Rovere Birth: about 1270 Death: |
| mother |
Catharina van Holland Birth: estimated a gap of 25 years — about 1293 38 |
|
Marriage: April 21, 1201 — |
|
|
118 years himself |
Jan I. zwederszoon van Montfoort Birth: about 1318 48 25 Death: in battle — September 16, 1345 — Warns, Nijefurd, Friesland, Netherlands |
| Family with Maria van Polanen |
| himself |
Jan I. zwederszoon van Montfoort Birth: about 1318 48 25 Death: in battle — September 16, 1345 — Warns, Nijefurd, Friesland, Netherlands |
| wife |
Maria van Polanen Birth: 1323 38 23 Death: 1385 |